Underarm crutch



FIG. 1 is a perspective view of an underarm crutch showing our new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a perspective view of the underarm crutch shown in an alternate state. 

CLAIM The ornamental design for an underarm crutch, as shown and described. 